1997 Ford Aerostar Lagging - Ignition System

Question:

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Technican: I did'nt seem to get enough information on your problem.It somtimes happens.Send the info again and we'll see what can be figured out. Paul

Owner: I have a 1997 ford aerostar with 67, 000 miles. The other day I got on the freeway and got up to about 70mph and it felt like something was wrong. The van started to act like the engine was missing. Then the engine light went on. IT seemed to lose power and when I got off the freeway it felt like it would died. I made it to a gas station and the guy there said it sounds like the spark plugs are bad. Would the engine light come on just with bad plugs? Thanks

Technican: O.K., before we can dismiss this as spark plugs, we need to explore a few more areas.You say you limped it into a service station where they assumed it to be the plugs.The fact that it was still running te;;s me you still had some spark and were getting at least minimal fuel to the injectors.There are a few sensors that come to mind that would not only cause this type of problem but also engage the check engine light.Have a systems diagnostics scan done before you just replace the plugs.Check with one of your local chain store parts houses.Some are offering this service for free or at a nominal charge.The sensors I'm thinking of will have sent a code to the ECM that can be retrieved that may pinpoint the problem without throwing parts at the vehicle.The sensors I'm thinking of are the MAP, TPS and O2.All of these work in unison to control air, fuel and exhaust consistency. Paul

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